Glosaurus
Human Anatomy

Peroneus brevis

A muscle located in the lower leg, playing a crucial role in foot movement and stability.
The peroneus brevis is a muscle of the lateral compartment of the lower leg. It originates from the lower half of the fibula and inserts into the base of the fifth metatarsal bone. This muscle is vital for the stability of the ankle and the foot during various movements.
Terminologia Anatomica
peroneus-brevis
System
Muscular system
Function
The primary function of the peroneus brevis is to facilitate eversion of the foot, which involves turning the sole outward away from the midline of the body. This action is important for maintaining balance and providing stability on uneven surfaces. Additionally, the peroneus brevis aids in plantarflexion, assisting in movements such as walking and running. By stabilizing the lateral aspect of the ankle, it helps to prevent injuries, particularly during activities that require lateral movements, like in sports. Its contribution to overall foot biomechanics makes it integral to maintaining proper posture and gait.
Location
The peroneus brevis is located in the lower leg, specifically in the lateral compartment, which is situated on the outer side of the leg. It originates from the fibula, a thin bone on the lateral aspect of the lower leg, and runs downwards before inserting at the base of the fifth metatarsal on the outer side of the foot. This positioning allows the muscle to exert its influence directly on the foot, linking the motion between the ankle and the forefoot. In relation to other muscles in the compartment, the peroneus longus runs parallel and is located above it, while the extensor digitorum longus is found in the anterior compartment, further showcasing the complexity and organization of the muscular structure in this area.
Did You Know?
  • The peroneus brevis is sometimes involved in sprains or strains due to its role in stabilizing the ankle.
  • It can be affected by conditions such as peroneal tendonitis or tears, leading to pain on the outside of the ankle.
  • Training the strength of the peroneus brevis can enhance athletic performance, especially in sports involving lateral movements.